BMR310 capacitor is IEC/EN/UL 62368-1 compliant and delivers high power density

22nd September 2021
Beatrice O'Flaherty

Flex Power Modules introduces the BMR310, a non-isolated switched capacitor intermediate bus converter which provides high power density for data centres, thus improving board space utilisation and freeing space for other components.

Built on Infineon Technologies’ proprietary zero voltage switching switched capacitor converter (ZSC), the BMR310 is over 98% efficient at half load, delivering power up to 875W continuous in a compact package. It operates over an input voltage range of 40V-60V and delivers an unregulated output voltage of 10V-15V.

There is a growing trend for high-performance computing applications and data centre to move away from 12V, instead adopting 48V in order to reduce distribution currents and power losses. To meet this increasing demand, the Infineon ZSC is suited to applications using 48V to generate an intermediate bus voltage. This is achieved through capacitive energy transfer with soft switching of the power MOSFETs, and therefore enables an easy and low-risk migration path for legacy 12V systems to a 48V infrastructure at significantly reduced total cost of ownership.

To lengthen its lifespan, the BMR310 includes over-voltage, under-voltage, over-current and over-temperature protection function. As with all Flex Power Modules’ DC/DC converters, it complies with IEC/EN/UL 62368-1 safety standards.

The BMR310 is mounted horizontally with a height profile of 10.3mm, making it suitable for systems with limited space due to large heatsinks or cold plates. It measures 58.4 mm x 25.0 mm x 10.3 mm. The current mounting option is base-plated but an open frame will be available with future models.

Paralleling of converters is supported using passive droop load sharing, enabling multiple converters to be combined to deliver higher power if required. The BMR310 is compatible with the Flex Power Designer software tool, and the new converter includes a PMBus interface for digital control.

“By fostering collaboration within the industry and utilising our application knowledge, we optimise our devices with the system in mind,” said Richard Kuncic, senior vice president and general manager DC/DC at Infineon’s Power & Sensor Systems Division. “We are proud to see that our partners are able to engineer ground-breaking solutions with our technology.”

The BMR310 will be available in November 2021 with evaluation samples for OEM orders available now.

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